Retainer for door firebreak with selection of power. Designed to keep the doors opened firebreak. The action of the equipment is effected on having stopped applying 24V. Force of eligible retention between 30Kg/300N and 60Kg/600N. I consume: 85mA to 24V. Equipped with plate ferromagnética articulated. Supplied with box, push-button of unfreezing and arm of 300 mm.